If it's just the typical "Wow, look at what he's doing" thing, I usually go with a stock answer like "yeah, he keeps me busy." or something to that effect. When the comments venture into the negative/judgmental area then I have a harder time holding back. I had an older lady stop me in the middle of Wal Mart to tell me that letting DS read at such a young age was bad for his development. I also had a daycare 'teacher' suggest that we should try to 'redirect' him back to things that are 'more appropriate to his age level' because otherwise we might cause him to 'burn out'. I still don't know how to best answer THOSE type of comments
